Table 3. "Y" Values of 41am in Barley Grown in Yolo Loam Soil With Different Concentrations of 2!Am Blended With Soil 24am Activity Levels in Soil Compared Harvest 1 Harvest 2 dpm/g Harvest 3 Harvest 4 Without DTPA 10,000 tY,Uy 4.000 0.823 0.765 0.443 0.752 20,000 10,000 0.000 0.415 0.523 0.547 40,000 ays 20,000 0.670 0.314 0.300 0.844 LSD 0.05 Mean NS 0.490 NS NS 0.498 NS 0.429 9.714 With DTPA 10,000 %,000 1.08 0.98 0.62 0.92 10,000 0.82 1.23 0.98 0.78 40,000 Shy 30, 000 1.67 1.13 1.19 1.29 LSD 0.05 0.47 NS 0.30 0.43 Mean 1.19 1.11 0.93 1.00 20,000 634